If louder than normal is what you are after, you should be looking at ported subs, not sealed ones. I would guess even the SVS PB10 could beat the SB12 with regards to output. The SB12 was made for a small footprint, not monster output. In that price range, I would look at the Outlaw Audio LFM-1 Plus, Hsu Research VTF2, or Elemental Designs A3-300. They cost the same as the SB12, but with regards to loudness, they will walk all over the SB12.